A multistage centrifugal pump has multiple stages that are connected in series. In the first chamber, fluid enters at suction line pressure and leaves at a higher pressure than when it entered. Once the fluid leaves the first stage, it enters the second stage, where it is subjected to further pressure increases. A pump's final discharge pressure is determined by how many stages it has, but its flow range is constant no matter how many stages are present.
Frequently Asked Questions
What are the benefits of multistage pumps?
Multistage pumps provide a better hydraulic lift. They are flexible and can be run at a lower speed if required. The hydraulic modules, the capability to supply additional impellers, and the ability to trim those impellers allow for meeting the duty point.
What are the differences between a single stage pump and a multistage pump?
A single stage pump uses one impeller whereas a multi stage pump uses 2 or more impellers. Diffusers are used in multistage pumps for channeling fluid. Multistage pumps have thrust balancing devices for shaft support.